I'm actually thinking of removing the reaction time modifier entirely.
Viewing post in Serious Sam: The Sequel (Public Beta) comments
Fine. As I understand it, it is this parameter that makes the balance so strange. The remaining parameters on normal and higher difficulties (except for movement speed) are similar to the original game. I note that sometimes when colliding at high speed, enemies lose a few hit points. Apparently this is due to the speed of 1.5. But this is no longer such a significant remark.